Version 1.1

1. Save file
2. Zoom and Pen cursors
3. Undo/Redo
4. Scale and normalization

Version 1.2

1. SPC (single spectrum) file format
2. "Noised" pen
3. Polynomial filter
4. Baseline correction

Version 1.3

1. Auto parameters for Polynomial filter
2. Edit view of parameters
3. Optimization